Company email (April 2012):
"All of our beers are vegan and are made in our own breweries. We do not contract brewing and use no animal products."

Company email:
"You'll be happy to know that there are no animal products in any of our bottled or standard keg products. One note, however - although we haven't used it during my tenure, we have in the past used isinglass as a fining agent in some of our firkins (cask-conditioned versions on handpump in our bar and other select establishments), and there is always the possibility that it could be used for the same purpose in the future. Let me know if you have any
further questions."